The verdict in three sentences
A technical SEO audit costs between 1,500 and 5,000 EUR in 2026, the price tracking page count and site complexity. It tells you precisely what stops your site from ranking: indexing, crawl, Core Web Vitals, structure, content, link profile. Once technical blockers are cleared, the typical impact is +20 to +50 % organic traffic within six months, without adding a single page.
The scope of a full technical audit
A serious audit is not just an automated tool report. It crosses machine data (crawl, logs, Search Console) with a human analysis of business priorities. Here are the six standard blocks and their usual weight.
| Audit block (2026) | What is checked | Potential impact |
|---|---|---|
| Indexing & crawl | Robots, sitemap, orphan pages, crawl budget | High |
| Core Web Vitals | LCP, INP, CLS on mobile | High |
| Structure & internal links | Architecture, internal links, silos | Medium-high |
| Content | Duplication, cannibalisation, intent | Medium-high |
| Markup & structured data | Titles, metas, schema.org | Medium |
| Link profile | Backlinks, anchors, toxicity | Variable |
The expected deliverable: a prioritised report (impact vs effort) and a costed roadmap your developers can act on.
Price by site size
Cost tracks mainly the volume of pages to crawl and analyse. A brochure site is quick; a site with thousands of URLs needs log analysis and rigorous sampling.
| Site type (2026) | Pages | Audit price EUR | Duration |
|---|---|---|---|
| Brochure / SME | < 50 | 1,500 – 2,500 | 1-2 weeks |
| B2B site with blog | 50 – 500 | 2,500 – 3,500 | 2-3 weeks |
| E-commerce / catalogue | 500 – 5,000 | 3,500 – 5,000 | 3-4 weeks |
| Large / multi-language site | > 5,000 | 5,000 + | 4-6 weeks |
Beware 300 EUR audits: they are tool exports with no prioritisation or roadmap, unusable as-is.
Mini case study
Sophie, marketing lead at a B2B software vendor in Nantes, runs a 380-page site stuck at 4,000 organic visits/month. She orders a 3,200 EUR audit: it reveals 90 duplicate pages, a 4.1 s mobile LCP and a broken internal linking. After 6 months of fixes (internal dev budget), traffic reaches 5,800 visits/month (+45 %). With each visit worth an average 0.80 EUR of attributed commercial value, the monthly gain is about 1,440 EUR, paying back the audit in just over two months.
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FAQ
Does a technical SEO audit include the fixes?
No, the audit diagnoses and prioritises; fixes are costed separately (internal dev time or a dedicated engagement). Some providers offer an audit + implementation bundle.
How often should I redo an audit?
A full audit every 12 to 18 months is enough, with light monthly monitoring in between. After a redesign or migration, an immediate audit is essential.
How long to see the effect of fixes?
Indexing gains show in 4 to 8 weeks; full traffic effect reads at 3-6 months. Core Web Vitals affect mobile ranking as soon as they pass.
Which tools are used?
Crawler (Screaming Frog, Sitebulb), Search Console, log analysis, PageSpeed/CrUX for Web Vitals. The tool doesn't make the audit: interpretation does.
Does an audit guarantee the +45 % traffic?
No, +20 to +50 % is an observed order of magnitude when real blockers exist. On an already clean site, the lever will be editorial rather than technical.
Let's scope your project. Tell us your page count, your CMS and your current organic traffic: we will frame the audit's scope and price. Detailed quote within 48 h. WhatsApp +221 77 596 93 33.
Mohamed Bah
Fondateur, Kolonell
Passionate about digital and entrepreneurship in Africa, Mohamed has been helping Sénégalese businesses with their digital transformation since 2020. Founder of Kolonell, he believes every SME deserves a professional and accessible online présence.
